Biodiversity Science ›› 2000, Vol. 08 ›› Issue (1): 95-102.doi: 10.17520/biods.2000013

• 论文 • Previous Article     Next Article

Gene frequency distributions of Anthoxanthum alpinumalong the altitudinal gradients in Swiss Alps

ZHAO Gui-Fang, Francois Felber, Philippe Kuepfer   

  1. Botanical Institute , University of Neuchatel , Chantemerle 18 , CH - 2007 , Neuchatel , Switzerland.
  • Received:1998-08-27 Revised:1999-08-27 Online:2000-02-20

Anthoxanthum alpinum has a continuous distribution from the treeline (1700 m) to the summit ridges (2830 m) in Arpette and Belalp of Valais , Swiss Alps. The highest and lowest sites of the transect differ by almost 1000 m in elevation , but only an average of 1. 4 km apart . A significant clinal variation was observed at three allozyme loci ( Px- 1 , Got- 2 and Mdh- 1) on all three transects. It suggests that gene flow among sub-populations may be too weak to overcome the effects of natural selection in favor of adaptations to local conditions , and that temperature variables may function as major selective force in this case.

No related articles found!
Full text